Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) WALSH JK,"Nightly treatment of primary insomnia with eszopiclone for six months : effect on sleep, quality of life, and work limitations",Sleep,,,2007,30,8,959-968,https://cir.nii.ac.jp/crid/1570572701398777984,